- #1
tomwilliam
- 141
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Homework Statement
Estimate a reynolds number for a pipe of 0.3m internal diameter, carrying water at a rate of 71 m/s, and say what that says about the likely nature of the flow.
Homework Equations
Re = (density x L x velocity of flow)/coefficient of dynamic viscosity for water
Viscosity of water = 8.9 x 10^-4 kg/m s
density of water = 1000 kg/m^3
The Attempt at a Solution
Well, I have produced a result of some 27 million, which seems excessive to me. Possible mistakes: I used the diameter of the pipe as L. Also, the flow speed is something I calculated in a previous question, so could potentially be wrong. The speed is just due to potential energy coming from a reservoir exactly 500m higher up, where pressure is atmospheric only.
Does anything sound wrong with this solution? I have no reference for typical reynolds numbers in these situations...
Thanks in advance